we know that president obama was briefed overnight. getting the latest information on the investigation, the details of what the fbi could tell him about the boston marathon bombings. he'll be meeting later today with other senior officials. >> our white house correspondent brianna keilar is covering that angle for us. she joins us now from the white house. good morning, brianna. >> good morning to you, john and chris. yes, president obama was briefed overnight by his homeland security adviser, lisa monaco. she will brief him again this morning, along with attorney general holder, and fbi director robert mueller. we have learned that he's coming to boston tomorrow. he will speak during that interfaith memorial service at the cathedral of the holy cross in boston. what is, of course, going to be an emotional event, as he strikes that consoler in chief tone that we've seen him, unfortunately, do on so many occasions where we've seen tragedy. we sue a little bit of this yesterday. he was talking about people who ran the marathon, and even